the GNU version of the Collaborative International Dictionary of English
adj. Not stratified; -- applied to massive rocks, as granite, porphyry, etc., and also to deposits of loose material, as the glacial till, which occur in masses without layers or strata.
The Century Dictionary and Cyclopedia
In botany, not stratified; not arranged in clearly definable layers or strata: applied to the thalli of certain lichens.
In geology, not stratified.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. not deposited in layers
Word Usage
"Shifts in diatoms from Fragilaria forms to a high abundance of the planktonic Cyclotella forms are consistent "with a shorter duration of ice cover, a longer growing season, and/or stronger thermal stratification patterns", such as a shift from unstratified to stratified conditions."